BoilerFaultCodesThe 6 most common faults
Your boiler has failed to light or maintain a flame, causing the system to shut down for safety.
Check if your home has other working gas appliances (like a hob) to ensure gas is reaching the propertyCheck that your gas prepayment meter has creditPress and hold the 'R' or reset button for a few seconds to restart the ignition process
Your boiler has switched itself off because it has detected it is getting too hot and needs to cool down for safety.
Ensure all radiator valves (TRVs) are turned to the highest settingCheck that the system water pressure is between 1.0 and 1.5 bar on the gaugeAllow the boiler to cool down and then press the 'Reset' button
Your boiler has stopped working because the water pressure is too low and needs to be topped up.
Locate the metal braided filling loop underneath or near the boiler.Open the black taps on the filling loop slowly until you hear water entering the system.Close the taps once the pressure gauge on the boiler reaches between 1 and 1.5 bar.
Your boiler has detected that the water pressure is getting low and needs to be topped up to continue working.
Locate the filling loop (usually a silver braided hose with small valves) underneath the boiler.Open the valves slowly until you hear water entering the system.Watch the pressure gauge and close the valves tightly once it reaches 1.5 bar.The error should clear automatically; if it has progressed to E040, you may need to press the Reset button.
Your boiler's internal water pressure sensor is reporting a fault, which has caused the system to shut down to prevent damage.
Check the pressure gauge on the front of the boiler; it should be between 1.0 and 1.5 bar.If the pressure is too low, use the filling loop valves to top up the water level.Restart the boiler by turning the mode selector switch to 'OFF/RESET' and then back to the desired position.
Your boiler is shutting down because the water in the central heating circuit has reached an unsafely high temperature.
Ensure all radiator valves are fully open to allow water to circulateCheck that the boiler pressure is between 1.0 and 1.5 bar on the pressure gaugeIf the pressure is low, top it up using the filling loopTry resetting the boiler using the control dial
on the Vokera Synergy Combi
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Vokera shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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